Boy F. Petersen, Jr.

This is one of the most useful GMing books that I own. It provides floorplans for a number of generic businesses your players are likely to encounter, such as bars, hotels, night-clubs, or banks. It's supposedly for 1st edition Shadowrun, but I used to use it for Cyberpunk 2020 all the time. I imagine it could be used with little modification in any modern or sci-fi setting you run.

There are also encounters, archetypes, and contacts here that are more specific to Shadowrun, but are still useful as a starting point for NPC ideas whatever system you're running.… (plus d'informations)